Kubernetes (k8s) is an increasingly popular container orchestration platform. With that popularity has grown an ecosystem of tools and frameworks. One such tool is Kustomize.
K8s desired states are declaratively described in resource description files such as deployment, services, configmaps, secrets, etc. As we vary the environments from dev to QA to prod these configurations to change. The database may change from an embedded H2 in dev to a MariaDB in QA to Oracle in prod, the amount of allocated memory for a container may change, secrets of user rid and password for the database may also change. Managing all these varying YAML files of deployment, services, etc. per environment can be quite a chore. Configuration management tools maintain consistency across these environments.